We note that the proof methods utilized to guarantee the existence of equilibria under Assumption 1 and 2 do not apply to partially observed \(N\) -player mean-field games with the observation channels of Assumptions REF  or REF . In our analysis to follow, for convergence results, we will be assuming the existence of subjective equilibria when one of Assumptions REF  or REF  holds. We emphasize that establishing existence of such subjective equilibria is an open problem. We note however that for a large number of agents (large \(N\) ), subjective equilibria almost coincides with Nash equilibria and therefore an existence analysis following [1]} can be employed for games with large \(N\) . See also [2]}, [3]}, [4]} and [5]} for related studies.
